Description
The RSA and DSA decryption code in Nettle makes it easier for attackers to discover private keys via a cache side channel attack.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | nettle | 3.3-1 | — |
| Debian 13 | nettle | 3.3-1 | — |
| Debian 12 | nettle | 3.3-1 | — |
| Debian 7 | nettle | 2.4-3+deb7u1 | DLA-593-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | nettle | 3.2-1ubuntu0.16.04.1 | USN-3193-1 |
| Ubuntu 14.04 LTS | nettle | 2.7.1-1ubuntu0.2 | USN-3193-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | nettle +1 | 2.7.1-8.el7 | RHSA-2016:2582 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP2 | libnettle | 2.7.1-12.1 | SUSE-SU-2017:1481-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP2 | libnettle | 2.7.1-12.1 | SUSE-SU-2017:1481-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | nettle +1 | 2.7.1-8.el7 | ELSA-2016-2582 |
Advisories 6
- WID-SEC-2026-3113 Red Hat Enterprise Linux: Mehrere Schwachstellen ermöglichen Umgehen von Sicherheitsvorkehrungen BSI CERT-Bund (WID) · Aug 31, 2026
- RHSA-2016:2582 Red Hat Security Advisory: nettle security and bug fix update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-3193-1 nettle vulnerability Ubuntu Security Notices (USN) · Apr 22, 2026
- DLA-593-1 nettle - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2017:1481-1 Security update for libnettle SUSE / openSUSE Security Updates · Feb 4, 2026
- ELSA-2016-2582 Moderate: nettle security and bug fix update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Nov 9, 2016
References
- [oss-security] 20160729 Re: CVE Request: nettle's RSA code is vulnerable to cache sharing related attacks mailing-list
- USN-3193-1 vendor-advisory
- GLSA-201706-21 vendor-advisory
- https://git.lysator.liu.se/nettle/nettle/commit/3fe1d6549765ecfb24f0b80b2ed086fdc818bff3
- https://bugzilla.redhat.com/show_bug.cgi?id=1362016
- https://eprint.iacr.org/2016/596.pdf
- RHSA-2016:2582 vendor-advisory
- https://www.oracle.com/security-alerts/cpuapr2020.html